When plug it to a power adapter or mobile power. It could broadcast Wi-Fi signal and allow you to securely connect tablets, computers, mobile phones and gaming devices, to the 4G mobile network or when you/'re on the move via Wi-Fi and 1 via USB interface. Usually no antenna is needed, but when installing the antenna, be careful not to use too much force to avoid damage to the antenna connector !!! U6 Europe version :4G B1/3/7/8/20/38/40/41 Specification: Peak rate: LTE speed up to 150Mbps External Antenna Slot: 1 ports WIFI: Support 802.11 b/g/n; Plug & Play Before purchasing, please read: 1. Before purchasing, you can check the frequency band in the link below to confirm if it meets local usage requirements<br><br>2. The frequency band used by the local country can be found in the following link<br><br>3. Frequency band query link used by local country operators<br><br>Color: White Material: ABS<br><br>Package Contents: 1 x Wireless Router 1 x Antenna / 1 x Wireless Router Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.